X-Ray Tetras

The Pristella Tetra (Pristella maxillaris), also known as X-Ray Tetra, is a beautiful and peaceful characin species known for its translucent body that allows you to see its internal structures. These attractive fish feature yellow, black, and white fin markings that create a striking contrast against their see-through bodies. Hardy, easy to care for, and exceptionally peaceful, Pristella Tetras are excellent choices for community aquariums and make a unique addition to any peaceful setup.

Care Sheet – Pristella Tetra (Pristella maxillaris)

Temperament

• Peaceful, social schooling fish

• Best kept in groups of 8 or more for natural behavior

Adult Size

• 1.5–2 inches

Minimum Tank Size

• 20 gallons for a school

Water Parameters

• Temperature: 72–82°F

• pH: 6.0–7.5

• Hardness: Soft to moderately hard (5–15 dGH)

• Ammonia/Nitrite: 0 ppm

• Nitrate: <20–30 ppm

Diet

• Omnivorous

• Feed a varied diet:

  • High-quality micro-flakes or small pellets

  • Frozen or live foods: brine shrimp, daphnia

  • Occasional vegetable matter

• Feed small amounts 1–2 times daily

Behavior & Compatibility

• Excellent for peaceful community tanks

• Compatible with:

  • Other small tetras, rasboras, and peaceful fish

  • Corydoras and other bottom dwellers

  • Dwarf gouramis and small peaceful shrimp

• Avoid large or aggressive fish

Aquarium Setup

• Planted tanks with dark substrate to enhance transparency

• Open swimming space in the middle levels

• Moderate lighting

• Clean, well-oxygenated water

Care Level

• Easy

• Very hardy and beginner-friendly

Lifespan

• 3–5 years with proper care

Special Notes

• Unique translucent body that shows internal structures

• Attractive yellow, black, and white fin markings

• Very peaceful and excellent community fish

• Schooling behavior creates beautiful synchronized movement